Faux = false or fake. 'mo' is short for "homo(sexual)". Therefore "feaux 'mo' fashion show" means a man wearing clothes that might cause him to appear gay, even though he is not. Such as when a man
accidentally (or purposely, for lack of clean clothes) wears an item of his wife's or girlfriend's clothing, not
something as overtly feminine as a dress, but, say, some women's jeans, or a shirt that almost, but not quite,
looks like a man's shirt.